Mold-form.



H. B. I OXTERIVIAN.

MOLD FORNI. APPLICATION FII-.ED FEB. 5, 1916.

1,227,280. Patented May 22,1917.

3 SHEETS-SHEET I.

l Mil-lil ATTORNEYS.

H. B. LOXTERIVIAN.

MOLD FORM.

APPLICATION msn fEB.5,1916.

1,227,280. Patented May 22,1917.

3 SHEETS-SHEET 2k- ATTO R N E YB.

H. B. LOXTERMAN.

MOLD FORM.

APPLICATION FILED FEB. 5, 1916.-

1,227,280. l Patented May'zz, 1917.

3 SHEETS-SHEET 3.

ATTORNEYS.

UNITED STATES PATENT OFFICE.

HOWARD B. LOXTERMAN, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO BLAW STEEL CONSTRUCTION COMPANY, OF HOBOKEN, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

j MOLD-Foam. l

I Patented May 22, 191'?.

Application Ied February 5, 1916. Serial No. 76,344.

To all whom t may concern Be it known that I, HOWARD B. LOXTER- MAN, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have. invented certain new and useful mprovements in Mold-Forms, of which the following is a specification.

This invention relates to mold forms, and more particularly to that class of forms used in the formation ofthe lower segments of a concrete tunnel, and has for itsprincipal objects, the provision of a moldfform which is simple, durable and easily applied and removed, the provision of a form that may be quickly set in place and which can readily be removed to another position when the concrete has become set, the provision'of a mold form wherein the frame carrying the form has telescoping engagement with the truck, whereby the form may be raised and lowered ywith respect to the truck, the provision of a truck for supporting the form which carries rails for a material car whereby material can be supplied at points intermediate the ends of the form, and such other tain embodiments of the invention are shown in the accompanying drawings, wherein- "Figure 1 is an end view of the complete mold friand truck; Fig.j2 is a sidel elevaltion of the truck and frame with the mold form removed, andr Fig. 3 is an end elevation of a modified form of mold form and truck. l

Referring more particularly to Figs. 1 and 2, the apparatus comprisesa pair of arcuate mold forms l which serve to form the concrete into lower half of the tunnel walls. Concrete is poured in at the top of the mold sections at A or points farther down the mold, and the concrete deposits between the form and the earth, indicated by dotted line B. l

The mold sections 1 are supported by a frame comprising a cross girder 2, the forms having sliding'engagement with the ends of the girder and attached thereto by means of the pins 3 which pass through the slots 4. Each mold section 1 is built up of panels which are joined to make up sections ofl approximately thirty feet in length, each sec- 'tion being supported by four sets of cross girders 2, see Fig. 2.

The cross girders 2 are connected by angle beams 5, and are supported by the vertical channels 6 which are bolted to 'the girders 2 and project downward into engagement with the truck. The truck comprises a base formed of transverse channels 7 which are supported upon truck channels 8. These channels extend longitudinally aof the form, the truck wheels 9 being pivoted between them upon the shaft 10, which extends through both sets of truck channels 8.- The transverse chanels 7 are connected by longitudinal girders 11, between which vertical columns 12 project upwardly.l These columns 12 comprise spaced channels 13 securely fastened at their lower ends to the transverse channels 7 and to the longitudinal channels 1l. Side plates 14 are riveted to the webs of the channels 13 forming a rectanglilar space between the inner faces of the channels 13 and the plates 14.

The vertical channels 6 of the frame telescope into the columns 12 of the truck and any lateral displacement of the frame with respect to the truck. is prevented.y A pair of jacks 15 are mounted upon the longitudinal girders l1 at each 'side 0f the truck, and engage at their upper endsthe longitudinal ,frame girders v16l which connect the vertical channels 6l "The"frarr`1`e;"thereforemay be raised or lowered with respect to the, truck by turning the screws of the jacks.

The lower ends of the mold sections 1 are supported by means of turn buckles 17 which connect the mold sections with the truck, the inner end of the turn buckle being pivoted to clips 18 which are riveted to the verf tical channels 13. By turning the buckle the lower end of the form may be raised or lowered as may be desired and adjustment of the upper end of the mold sectionl is accomplished by manipulation of the turn buckle 19, which is attached at one end to afs frame is then elevated by means of the jack screws 15, so that the mold sections entirely clear the formed concrete. While the sections are in. this withdrawn position the truck carrying the frame and sections may be .again advanced into a new position and another section of the tunnel formed.

Upon the cross channels 7 of the truck, a pair of wooden stringers 22 extend longitudinally of the form and serve to support a pair of rails 23. These rails carry a truckl 24. ,which is filled with mixedconcrete and may be moved along the rails to the position best vsuited for unloading where the concrete is needed. The provision of a track for the concrete car mounted upon the mold form truck makes it possible to distribute concrete where needed quickly and efficiently and has many advantages over the old method of. supplying concrete, which necessitated carrymg the concrete from the end of the mold. The open construction of this mold form support, including the frame and the truck, permits of free movement in the operation of the form and the distribution of concrete.

Referring to Fig. 3, a modified form of truck and rame construction is illustrated which works on a similar principle to that of the aplparatus just described with the exception t at the truck sections are not connected as in the .previously described apparatus. The shape of the mold 'form is irregular, this form `being` adapted to produce ledges or benches extendin longitudinally of the tunnel. The materia car in this case is not carried by the truck but is mounted upon the base timbers which serve to suppirt the rails upon which the form truc r1 ke.

This apparatus comprises form sections 25 and 26 which are supported upon the cross channels 27 by means of the pins 28 which are slidably mounted in slots 29 cut in the webs 30, which are bolted to the extreme ends of the cross channels 27. The upper ends of the mold forms are moved in or out by means ofturn buckles 31 in a manner similar to' the previously described apparatus, and the lower ends of the forms are moved-inward by means of turn buckles 32 which are secured at one end to the lower end of the mold form and at the other end to Webs 33 which are secured to the vertical truck columns 34.

The truck columns 34 are built up of channels 35 in a manner similar to the apparatus previously described, and receive the vertical channels 3G which project downwardly from the cross channels 27 and have a telescoping engagement with the vertical columns 34. The channels 37 extend longitudi- 'nally of the mold and rigidly connectthe vertical channels 36. The vertical column 34, which is built up .of the channels 35, is securely riveted to the longitudinal truck channels 38, which carry the truck Wheels `sections may be moved vertically and laterally as desired, for adjusting the mold sections in proper position and properly centering -them.'

The mold sections in this apparatus comprise a pair of curved top sections`41 and 42, a pair of stepped flat sections 43 and 44, andlower curved sections 45 and 46. The

curved ysections 41 and 42 are connected to. vertical angles 47 and 48, respectively, by

means of brace plates 49 and 50, respectively, and the angles 47 and 48 are secured to the curved bottom sections 45 and 46, respectively, and serveto support them. In order to withdraw these forms from the finished concrete it is necessary to move them in- -wardly by means of the turn buckles and.

then move them vertically by means of the jack screws 40, after which the form may be moved into position for forming a newsection 'of the tunnel.

The trucks are supported upon rails 51 which extend longitudinally along the bottom of the tunnel and are supported by cross .timbers 52, and another pair of rails 53 extend longitudinally of the tunnel and are supported upon the cross timbers 52. These latter rails are for supporting cars for carrying the concrete.

It is obvious that many changes may be made in the details of the construction illustrated without departing from the spirit of the invention and the invention is not limtrated and described. What I claim is:

l. In combination, a mold form, a truck,

vertical standards carried by the truck at each side thereof, a frame for supporting the mold form having downwardly' extending vertical standards adapted to slidably engage the vertical standards on thetruck,

and means for holding the frame in various adjusted positions with respect to the truck. 2. In combination, a mold form, a truck,

vertical standards carried by the truck at each side thereof, a frame for supporting the mold form having downwardly eXtending vertical standards adapted to telescopically engage the vertical standards on the truck, and means whereby the frame may be wardly extending vertical standards adaptedl to telescope within the vertical standards carried by the truck, and means whereby the frame may be vertically adjusted with 15 respect to the truck.

4. In combina-tion, a truck, a mold form, a rigid frame for supporting the mold form, and a plurality of telescoping columns having their ends rigidly connected to the truck zo and the frame for adjustably supporting the frame above the truck, and means whereby the frame may be adjusted lvertically with respect to the truck.

HOWARD B. LOXTERMAN. 

